如何在Hibernate 5中解决AbstractMethodError？

Question

我正在尝试将Java EE中的休眠5与tomcat 7一起使用，并且出现此错误：

java.lang.AbstractMethodError
org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:278)
org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444)
org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:802)
org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:58)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
controller.dao.GenericDAO.<clinit>(GenericDAO.java:28)
com.mycompany.mazkrest.UsuarioResource.login(UsuarioResource.java:89)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:483)
org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:309)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
org.glassfish.jersey.internal.Errors.process(Errors.java:315)
org.glassfish.jersey.internal.Errors.process(Errors.java:297)
org.glassfish.jersey.internal.Errors.process(Errors.java:267)
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:292)
org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1139)
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:460)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:386)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:334)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:221)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

我正在使用JPA 2.1，已经删除了所有旧的jpa版本的jar。

这是我对pom.xml的依赖：

<dependencies>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet-core</artifactId>
        <!-- <version>${jersey.version}</version>-->
        <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
        <!-- artifactId>jersey-container-servlet</artifactId -->
    </dependency>

    <dependency>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.6</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.36</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.6.1</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.6.1</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.jaxrs</groupId>
        <artifactId>jackson-jaxrs-json-provider</artifactId>
        <version>2.6.1</version>
    </dependency>

    <dependency>
        <groupId>com.voodoodyne.jackson.jsog</groupId>
        <artifactId>jackson-jsog</artifactId>
        <version>1.1</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.6.1</version>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
        <!--  <version>${jersey.version}</version>-->
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-search</artifactId>
        <version>5.3.0.Final</version>
    </dependency>

    <dependency>
        <groupId>org.apache.lucene</groupId>
        <artifactId>lucene-core</artifactId>
        <version>5.3.0</version>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>5.0.1.Final</version>
    </dependency>

    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-web-api</artifactId>
        <version>7.0</version>
        <type>jar</type>
    </dependency>
</dependencies>

当我第二次执行引发异常的代码时，我得到了NoDefClassFoundError。

休眠状态似乎在日志中启动，但是没有创建实体管理器。

如何解决呢？

Answer 1

当您用来编译的 jar 与服务器运行代码时引用的 jar 之间不兼容时，会抛出 AbstractMethodError。

http://docs.oracle.com/javase/7/docs/api/java/lang/AbstractMethodError.html

“当应用程序尝试调用抽象方法时抛出。通常，此错误会被编译器捕获；此错误只会在运行时发生，如果自上次编译当前执行的方法以来某些类的定义发生了不兼容的更改。

这可能是由于 hibernate-search 和 hibernate-entity-manager 的版本

休眠搜索似乎正在使用 hibernate-commons-annotations 4.0.5 final

http://mvnrepository.com/artifact/org.hibernate/hibernate-search-engine/5.3.0.Final

然而

Hibernate 实体管理器似乎正在使用 hibernate-commons-annotation-5.0.0.Final

http://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager/5.0.1.Final

检查 eclipse 中 pom.xml 的 Dependency Hierarchy 选项卡，以找出正在使用的确切 jar 版本。用于排除不兼容的版本。通常这是由 pom 自动完成的。您还可以检查您的 WEB-INF/lib 文件夹以查看正在下载的 jar 包。

我也看到你正在使用这个罐子。如果您使用的是 tomcat 7，最好改用它并“提供”其范围，因为在运行时，Web 应用程序指的是 tomcat servlet api jar。

<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-servlet-api</artifactId>
    <version>7.0.21</version>
    <scope>provided</scope>
    </dependency>